package class05;

import javax.crypto.AEADBadTagException;
import java.util.Arrays;

/**
 * @author zhangchaoliang
 * create 2022
 */
public class CountSort2 {

    public static void countSort(int[] arr){
        if (arr==null||arr.length<2)
            return;
        int max = Integer.MIN_VALUE;
        for (int i=0;i<arr.length;i++)
            max = Math.max(max,arr[i]);
        int[] bucket = new int[max+1];
        for (int i=0;i<arr.length;i++)
            bucket[arr[i]]++;
        int i=0;
        for (int j=0;j<bucket.length;j++){
            while (bucket[j]-->0)
                arr[i++]=j;
        }
    }

    public static void comparator(int[] arr){
        Arrays.sort(arr);
    }

    public static int[] generatorRandomArray(int maxSize,int maxValue){
        int[] arr = new int[(int) ((maxSize+1)*Math.random())];
        for (int i=0;i<arr.length;i++)
            arr[i]=(int)((maxValue+1)*Math.random());
        return arr;
    }

    public static int[] copyArray(int[] arr){
        if (arr==null)
            return null;
        int[] arr1 = new int[arr.length];
        for (int i=0;i<arr.length;i++)
            arr1[i]=arr[i];
        return arr1;
    }

    public static boolean isEqual(int[] arr1,int[] arr2){
        if ((arr1==null&&arr2!=null)||(arr1!=null&&arr2==null))
            return false;
        if (arr1==null&&arr2==null)
            return true;
        if (arr1.length!=arr2.length)
            return false;
        for (int i = 0;i<arr1.length;i++){
            if (arr1[i]!=arr2[i])
                return false;
        }
        return true;
    }

    public static void printArray(int[] arr){
        if (arr==null)
            return;
        for (int i =0;i<arr.length;i++)
            System.out.print(arr[i]+" ");
        System.out.println();
    }

    public static void main(String[] args) {
        int testTime = 500000;
        int maxSize = 100;
        int maxValue =150;
        boolean succeed = true;
        for (int i=0;i<testTime;i++){
            int[] arr1 = generatorRandomArray(maxSize,maxValue);
            int[] arr2 = copyArray(arr1);
            countSort(arr1);
            comparator(arr2);
            if (!isEqual(arr1,arr2)){
                succeed=false;
                printArray(arr1);
                printArray(arr2);
                break;
            }
        }
        System.out.println(succeed?"Nice":"Fucking fucked!");
    }


}
